12 Questions 20 Answers 0 Followers
Questions related from Donggyu Jang
Hello. Let's say time tsi = 10 s, electric field strength Esi = 10 V/m in SI unit. In order to convert these to those in atomic system of units, I think right procedure is that tat =...
08 August 2016 5,788 1 View
Hello. The famous ADK (Ammosov, Delone, and Krainov) tunnel-ionization model (M. V Ammosov, N. B. Delone, and V. P. Krainov, “Tunnel ionization of complex atoms and of atomic ions in an...
08 August 2016 9,262 5 View
Hello. As the title said, I really want to know the specific reason why ICP simulation (espcially using COMSOL) typically consider only 1st excited state in Argon plasma? As listed in the...
07 July 2016 6,512 6 View
Hello. I'm now studying surface treatment by plasma and many "surface activation" are observed in my search. According to their articles, surface activation is to help surface to bond with some...
05 May 2016 9,804 2 View
Hello. I was thinking about building Faraday cage to shield the radiation EMI of ~1 to 100 MHz frequency from inside and asked several question here. One interesting answer is that The cage could...
07 July 2015 250 5 View
Hello. I'm studying transistor for the first time:) and have seen some wired statement. It appears that base-emitter voltage (Vbe) in transistor is always assumed as 0.6 V in circuit analysis....
06 June 2015 1,007 8 View
Hello. I would like to measure electron density of Argon ICP (Inductively Coupled Plasma). Our goal is to generate ICP with electron density of 10^13 cm^(-3) order thus the range of this density...
06 June 2015 581 14 View
Hello. I have very simple question: What are Mg II and Mg I. Mg is chemical symbol for Magnesium and I believe Greek number next to Mg should indicates ionization state of element. Could you tell...
05 May 2015 877 0 View
Hello. The mechanism of the gas discharge is quite well-known when the gas is filled between two plane electrodes. In this case electron emission from cathode have significant role to get into...
04 April 2015 1,118 8 View
Hello. It is well known that photon is well absorbed to the atom (or ion) if energy difference between two levels are perfectly matched to the photon energy. What about the case that photon energy...
03 March 2015 3,603 5 View
Hello. For typical spherical lens, calculation of the focused intensity for the laser is simple: numerical number gives diffraction limited focused radius of the laser thus everything is...
02 February 2015 1,483 6 View
Hello. There is an instument with HighZ load and this is connected via 50 Ohm BNC cable to Oscilloscope(OSC) with several impedance selections (HighZ, 75 and 50 Ohm). People say I can choose 50...
02 February 2015 8,768 11 View
